<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	
    private $_id;
 
    public function authenticate()
    {
        $username=strtolower($this->username);
        $user=User::model()->find('LOWER(username)=?',array($username));
        if($user===null)
            $this->errorCode=self::ERROR_USERNAME_INVALID;
        else if(!$user->validatePassword($this->password))
            $this->errorCode=self::ERROR_PASSWORD_INVALID;
        else
        {
            $this->_id=$user->id;
            $this->username=$user->username;            
            $this->errorCode=self::ERROR_NONE;

        }
        return $this->errorCode==self::ERROR_NONE;
    }
 
    public function getId()
    {
        return $this->_id;
    }
    
    /*
    public function authenticate()
    {
        $users=array(
            // username => password
            'demo'=>'demo',
            'admin'=>'admin',
        );
        if(!isset($users[$this->username]))
            $this->errorCode=self::ERROR_USERNAME_INVALID;
        else if($users[$this->username]!==$this->password)
            $this->errorCode=self::ERROR_PASSWORD_INVALID;
        else
            $this->errorCode=self::ERROR_NONE;
        return !$this->errorCode;  
    }  
      * 
    */
    
}